Fluorocarbons (compounds that contain both carbon and fluorine) were, until recently, used as refrigerants. The compounds listed in the following table are all gases at 25 °C, and their solubilities in water at 25 °C and 1 atm fluorocarbon pressure are given as mass percentages. (a) For each fluorocarbon, calculate the molality of a saturated solution.

Video transcript

Hi everyone here we have a question telling us the following are some sulfate salts with their cell viability. Mass percent and water at 25 degrees Celsius, silver sulfate equals 0.830 blood sulfate equals 0.44 Or three. Barium sulfate equals 0.245. And strontium sulfate equals 0.0135. If a saturated solution was created individually for each of the sulfate salts given above, what will be their morality. So solly ability and water equals grams of solute Over 100 g of water. So let's start out here with silver sulfate. We have zero .83g times one mole divided by It's Mueller mass 311.799 g divided by g of water times one kg, Divided by 1000 g equals zero point zero 2662. And if we want to put that in scientific notation we're gonna move the decimal point to the right 12 places. So that is 2. Times 10 to the -2. And that is our first answer. Now we're going to do the same for lead. Sulfate, not equals 0.0044, three grams times one mole, Divided by 303 . g divided by 100 g of water times one kg Divided by g and that equals 1. Times 10 to the -4. And that is our second answer. Next we have barium sulfate which equals 0. times one mole Divided by its molar mass. So 233.38 g divided by 100 g of water, times one kg Divided by g. And that equals 0. 49 79. And if we want to put that in scientific notation, we're gonna move our decimal point to the right 12 places. So that would be 1. times 10 to the negative two. And that is our third answer. And then lastly we have strontium sulfate which equals 0.0135 g times one mole Divided by its molar mass. 183 .68 g Divided by 100 g of water times one kg Divided by 1000 g. And that equals 7. Times 10 to the -4. And that is our last answer. Thank you for watching. Bye.